hello deisel heads,
i have a 04 duramax, it has power to turn on heater, radio, lights, etc. but glow plugs, and starter don't. I am thinking it may be the parking switch on tranny????
any help is muchly appreciated

 

have you checked fuses?

 

fuses are good, i have been trying to warm up electrical with a heat gun but no luck yet

 

sounds like you have a more serious issue than cold? it's only in the 20's here in ohio today.

have you tried swapping relays around and checking connectors?

 

well i got it going, i warmed up the relays and it cranked right up. still not sure which one is bad. i picked up a new one and im going to replace the ignition relay first and go from there. now the turn signals stopped working then the check engine light came on and the turn signals started working.... beats me. taking it to my mechanic tonight